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52f7e44ec8
Fixes #15978 Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/16019)
78 lines
3.7 KiB
C
78 lines
3.7 KiB
C
/*
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* Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdlib.h>
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#include <openssl/bn.h>
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#include "internal/cryptlib.h"
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#include "crypto/sparc_arch.h"
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#include "bn_local.h" /* for definition of bn_mul_mont */
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int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num)
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{
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int bn_mul_mont_vis3(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num);
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int bn_mul_mont_fpu(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num);
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int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num);
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if (!(num & 1) && num >= 6) {
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if ((num & 15) == 0 && num <= 64 &&
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(OPENSSL_sparcv9cap_P[1] & (CFR_MONTMUL | CFR_MONTSQR)) ==
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(CFR_MONTMUL | CFR_MONTSQR)) {
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typedef int (*bn_mul_mont_f) (BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp,
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const BN_ULONG *np,
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const BN_ULONG *n0);
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int bn_mul_mont_t4_8(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0);
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int bn_mul_mont_t4_16(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0);
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int bn_mul_mont_t4_24(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0);
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int bn_mul_mont_t4_32(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0);
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static const bn_mul_mont_f funcs[4] = {
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bn_mul_mont_t4_8, bn_mul_mont_t4_16,
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bn_mul_mont_t4_24, bn_mul_mont_t4_32
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};
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bn_mul_mont_f worker = funcs[num / 16 - 1];
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if ((*worker) (rp, ap, bp, np, n0))
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return 1;
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/* retry once and fall back */
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if ((*worker) (rp, ap, bp, np, n0))
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return 1;
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return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);
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}
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if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3))
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return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);
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else if (num >= 8 &&
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/*
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* bn_mul_mont_fpu doesn't use FMADD, we just use the
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* flag to detect when FPU path is preferable in cases
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* when current heuristics is unreliable. [it works
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* out because FMADD-capable processors where FPU
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* code path is undesirable are also VIS3-capable and
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* VIS3 code path takes precedence.]
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*/
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( (OPENSSL_sparcv9cap_P[0] & SPARCV9_FMADD) ||
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(OPENSSL_sparcv9cap_P[0] &
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(SPARCV9_PREFER_FPU | SPARCV9_VIS1)) ==
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(SPARCV9_PREFER_FPU | SPARCV9_VIS1) ))
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return bn_mul_mont_fpu(rp, ap, bp, np, n0, num);
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}
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return bn_mul_mont_int(rp, ap, bp, np, n0, num);
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}
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